Reversing valve-gear.



J. E BROGDON.

REVERSING VALVE GEAR.

APPLICATION FILED AUG.27. 1915.

a 14 van {"oz Patented Sept. 18, 1917.

2 SHEETSSHEET 1.

UNITED sra'rns PATENT curios.

JOEL BRO GIDON, OF MONTGOMERY, ALABAMA, ASSIGNOR OF ONE- FOURTH TOARGHIBALD H. ARRINGTON, OF MONTGOMERY, ALABAMA.

REVERSING VALVE-GEAR.

Specification of Letters Patent. Patented Sept. 18, 1917- Applicationfiled August 27, 1915. Serial No. 47,626.

To all whom it may concern:

Be it known that I, Jon. E; BnoeDoN, a citizen of the United States,residing at Montgomery, in the county of Montgomery and State ofAlabama, have invented new and useful Improvements in Reversing Valve-Gear, of which the following is a specification.

This invention" relates to reversing valve gear for locomotive,stationary and marine engines, the valve gear of this invention derlvingits motion from the eccentric or eccentric crank through a novelarrangement of levers hereinafter particularly described.

The particular feature of the valve gear forming the subject matter-ofthis invention resides in the arrangement of the levers, theirsupporting means and connections and the means by which the cut-oil ortravel of the sliding valve and the reverse motion is obtained,resulting in a simple construction, economical in maintenance and fuelconsumption.

With the above and other objects in view, the invention consists in thenovel construction, combination and arrangement of parts, as hereindescribed. illustrated and claimed.

In the accompanying drawings Figure 1 is a view partly in side elevationand partly in section illustrating the reversing valve gear of thisinvention as applied to a locomotive engine.

Fig. 2 is an enlar ed side elevation of the radius fulcrum bracket,radius hanger and radius hanger fulcrum bar.

Fig. 3 a similar view of the radius hanger and radius hanger fulcrumbar.

Fig. 4 is an edge view of the parts shown in Fig. 2.

Referring to the drawings 1 designates the cylinder of a locomotiveengine, 2 the slide valve controlling said cylinder, 3 the valve rod, 4the eccentric rod and 5 the reversing lever.

In carrying out the present invention, I em loy a transmission hanger 6which is pivotally connected at 7 to one end of the eccentric rod 4, thehanger 6 being pivotally connected at 8 to the arm 9 of the bell cranklever, the other arm 10 of said lever being pivotally connected at 11 tothe valve rod 3. The bell crank lever is shown as pivotally mounted at12 in a bracket 13 secured to a support 14- Extending horizontally fromthe support 1% is a fulcrum castingsupport 15 embodying oppositelyarranged bars in spaced relation to each other to which are secured theparallel arms 16 of a radius fulcrum bracket 17, the arms 16 being shownasprovided with flanges 18 which. may be bolted, riveted or otherwisefastened to the fulcrum casting support'15.

19 designates a radius hanger which is pivotally connected at 20 to anopen center radius hanger fulcrum bar desi nated generally at A andcomprising the two side members 21 arran ed in spaced relation to eachother and adapted to swing between. the side arms 16 of the bracket 17The fulcrum bar A is pivotally connected at 22 to the bracket 17 and theradius hanger 19 is pivotally connected at 23 to the eccentric rod 4.

The radius hanger fulcrum bar A is extended beyond the pivot point 20 toform an extension or shorter arm 24: to which is pivotally connected at25 an auxiliary reach rod 27 which connects pivotally at 27 with the arm28 of a reversing shaft 29. 30 designates a reach rod pivotallyconnected at 31 to the arm 28 and connected at 32 to the reversing lever33 which is usually ar ranged in the cab of the locomotive.

From the foregoing description, taken in connection with theaccompanying drawings, it will now be understood that when the reversinglever 33 is moved to one limit of its throw. the point 20 is shifted ina corresponding direction thereby changing the position of the fulcrumbar A and correspondingly shifting the pivot point 23. This produces inturn a shifting of the pivot point 27 and through the medium of the bellcrank lever, the rod 3 and consequently the valve 2 is shifted, the twoextremes of movement of the lever 33 resulting in shifting the valvegear as a whole so as to cause the engine to drive ahead or reverse.

The construction hereinabove described embodies an extremely simplereversing valve gear, economical in production and maintenance andresulting in a saving of fuel and steam. The economy in fuel is broughtabout bv the quick action of the valve at the beginning and ending ofits stroke and the economy of maintenance is due to the fact that theusual fiat wear ing; surfaces are dispensed with and all bearings may berenewed by supplying new bushings or pins. 7

Having thus described my invention, I claim In reversing valve gear forsteam engines, the combination of a one-piece eccentric rod, slide valverod, a fulcrum support embodying parallel bars in spaced relation toeach other, a single transmission hanger pivotally connected at one endto the eccentric rod,, a bell crank connecting the transmission hangcrwith said valve rod, a stationary U sha ed radius fulcrum bar bracketembodying laterally spaced .side portions fastened to the parallel barsof the fulcrum support, an inverted substantially U-shaped radiusfulcrum bar havingthe extremities of both arms thereof pivotallyconnected to said bracket near the lower end thereof and also having anupstanding arm rising above the fulcrum of the radius hanger,a radiushanger pivotally connected at its upper end to and working between thearms of said fulcrum bar and pivotally connected at the lower end tosaid eccentric rod,

JOEL E. BROGDON.

iVitnesses T.. B. GISSENDANER, MARY M. 'I'IALE.

Copies of this patentmay'be obtained for five cents each, byaddrcssingthe Commissioner of Patents,

Washington, D. C. V

